Teeb 1
- Q: Dab tsi yog qhov sib txawv ntawm ASTM thiab GB sib npaug lub suab sib npaug?
A: ASTM (American Society rau kev sim thiab cov ntaub ntawv) thiab GB (Suav lub teb chaws) sib npaug cov qauv sib txawv ntawm cov qauv cheeb tsam, cov khoom siv neeg kho mob, thiab cov ntawv thov. ASTM cov qib nyiam A36 thiab A572 kom pom tseeb rau cov tawm los / A57 MPA tawm los; thiab muaj ntau nyob rau North America / Europe. GB cov qib xws li Q235 (235 MPa tawm los) thiab Q345 (345 MPa tawm los) ua raws li Suav cov qauv, dav siv nyob rau hauv Asia. ASTM Cov Nqis Mus Txog Qhov Coob Tshuaj lom neeg sib txawv sib txawv sib txawv heev-}}}}}}}}}}}} muaj dua manganese rau lub zog, GB Q345 ntxiv trace alloys rau kev tawv. Kev xaiv nyob ntawm qhov chaw ua haujlwm, cov cai yuav tsum tau ua, thiab siv nyiaj txiag.
- Q: Yog A572 Zoo dua A36 rau hnyav {{2} bead sib npaug ces kaum?
A: Yog, A572 yog qhov zoo dua li A36 rau hnyav {2} Hib Lauj muaj sib npaug cov ntawv thov. A572 (piv txwv li, Qib 50) muaj tsawg kawg yog lub zog ntawm 346 MPA, ua kom nws tau ntaus cov qauv hluav taws xob zoo li choj bracing lossis kev txhawb nqa kev lag luam crane. Nws lub zog tensile (450-550 mpa) tshaj A36's (400-550 MPA), txo kev phom sij tsis zoo rau kev ntxhov siab heev. A572 lub alloy muaj pes tsawg leeg (manganese, vanadium) txhim kho kev nruj, ua rau nws haum rau kev thauj khoom hnyav. Thaum A572 raug nqi 15% -20% ntau tshaj A36, nws tso cai rau lub hnab ntim rau ntau thiab tsawg rau cov nqi khoom siv tas nrho. Rau cov phiaj xwm zoo li cov kab tsev loj lossis cov pob hluav taws kub, A572 lub zog yog tsim nyog tus nqi.
- Q: Qhov ntau thiab tsawg ua Q235 sib npaug kaum sab xis ntawm cov khoom sib txuas tuaj?
A: Q235 Sib npaug lub kaum sab xis sib npaug muaj nyob rau hauv ntau qhov ntau thiab tsawg kom haum muaj ntau yam sib txawv. Cov ceg ntev ntev pib thaum 20mm (20x20xm) rau cov haujlwm teeb pom kev zoo thiab nce mus txog 200 hli (200x (200x) rau kev tsim kho hnyav. Thicknesses sib haum rau cov ceg ntev: Cov ces kaum me me (20-50mm obls) muaj 2-6m thickness, nruab nrab (60-200mm) 10-20 hli. Txheem ntev yog 6M, 9m, thiab 12m, nrog kev cai ntev txog 18m rau kev txiav txim siab. Cov Nrov Ntau thiab 50x50x5mm thiab 80 X80 XM8mm yog ib txwm nyob hauv Tshuag, thaum loj dua (160 x160mm +) tej zaum yuav muaj 3-7 hnub ua. Q235 lub versatility loj ua rau nws zoo tagnrho rau txhua yam ntawm rooj tog ntas los tsim kab teeb.
- Q: Yuav Q345 cov ces kaum sib npaug hloov A572 hauv tsis -}}}}}}}}}}}}}}}}}}}}} Astm cov phiaj xwm?
A: Yes, Q345 equal angles can replace A572 in non-ASTM compliant projects. Ob qho tib si tau ze li ntawm cov txiaj ntsig zoo nkauj (Q345: 345 mpa; A572: 450}}}}} Lawv tau ob qho tib si siab- Lub zog qis-alloy (hsla) nrog weldability zoo thiab formability, tau tshaj, Tig vuam. Q345 feem ntau muaj txiaj ntsig zoo dua thiab npaj tau nyob hauv cov lag luam Asian, thaum A572 tus neeg hauv North America. Rau cov phiaj xwm tsis tau khi los ntawm ASTM cov qauv (piv txwv li, kev tsim kho hauv zos hauv Asia), Q345 yog qhov kev hloov pauv ncaj qha uas txuag tau tus nqi yam tsis muaj lub zog. Nco ntsoov xyuas cov tshuaj phim kev sib tw rau cov ntawv thov tseem ceeb.
- Q: Yuav txheeb xyuas yog li cas yog tias kub -}} rolled sib npaug ces kaum sib npaug sib ntsib Astm / GB tus qauv?
A: Txhawm rau txheeb xyuas kev ua raws li, thawj zaug thov daim ntawv pov thawj khoom siv (MTC) los ntawm cov khoom lag luam {} Daim ntawv sau ua ke ntawm ASTM (piv txwv li, A36 / A5, Q235) specs. Tshawb xyuas cov npoo npoo rau zeb nyiaj muas (piv txwv li, "ASTM A36" lossis "GB Q345") thiab cov cim zoo. Ntsuas qhov ntev (ceg ntev, tuab, 90℃kaum sab xis) nrog calipers kom ntseeg tau tias lawv haum astm / ± 1mm rau ob txhais ceg). Rau cov phiaj xwm tseem ceeb, xa cov qauv rau ib feem peb-} ib tog ib tog rau tensile / cuam tshuam xeem. Xyuas rau cov kub muaj peev xwm kub ntxhov - rolled tiav (tsis muaj kab nrib pleb, pits Cov neeg xa khoom tau muab cov khoom lag luam ua raws, yog li xaiv cov neeg muag khoom uas muaj pov thawj.
Teeb 2
- Q: Vim li cas thiaj xaiv kub -}} rolled hla cold-}} rolled sib luag kaum?
A: Kub -}} rolled sib luag ces yog qhov ua tau zoo rau cov nqi tsawg dua li txias dua, txo qis cov nqi. Lawv muaj kev sib txuas tau zoo dua, ua rau lawv yooj yim khoov, weld, thiab txiav rau kev cai fabrication (piv txwv li, nkhaus ntas). Kub {{{}} Rolled cov qauv muaj cov qauv grain, ua kom muaj zog sib xws thoob plaws cov khoom siv, tseem ceeb rau kev siv lub zog. Tsis zoo li cas txias - rolled tuav, lawv tsis muaj kev ntxhov siab nyob ntau, yog li lawv yuav tsis tua tom qab kev teeb tsa. Lawv cov kev ntxhib ntxoo me ntsis txhim kho cov xim pleev xim rau xim / Galvanizing adhesion, txhim kho durability. Txias - rolled tuav yog smoother tab sis pricier, yog li kub {le} Xaiv yog qhov kev xaiv ua haujlwm, thiab DIY cov phiaj xwm.
- Q: Dab tsi yog tus nqi ntau ntawm A36 sib npaug kaum sab xis?
A: A36 sib npaug lub kaum sab xis sib luag800 ib Metric tuj, nyob ntawm qhov loj thiab ntau. Me me (20x20x3mm) yog600 / Tuj, Nruab Nrab (63x63XMM)700 / tuj, thiab loj (125x125xm)800 / tuj. Kev txiav txim ntau dua 100 tons tau txais 5% -10% luv nqi, nqa loj dua rau750 / tuj. Seasonal demand (peak in spring/summer) raises prices by 5%-15%, while raw material (iron ore) fluctuations cause short-term shifts. Kub-dipped galvanizing ntxiv 30% -50% rau tus nqi rau corrosion tsis kam. Kev xa khoom thoob ntiaj teb (piv txwv li, Asmeskas rau Tebchaws Europe) ntxiv100 / tuj. Thov tiag - lub sij hawm quotes nrog loj, kom muaj nuj nqis, thiab qhov chaw xa tawm rau raug.
- Q: Yog Q235 Haum rau Sab Nraum Sab Nraum Sab Nraum Zoov Hlua?
A: Q235 yog qhov tsim nyog rau kev siv sab nraum zoov yog tias muaj kev tiv thaiv kom yog, raws li nws yog ib qho carbon stone kom xeb. Qhov kev tiv thaiv zoo tshaj plaws yog kub- dip txheej uas tiv thaiv cov qauv sab nraum zoov zoo li laj kab, thiab kos npe. Painting nrog huab cua {13 {{ove} Tsis kam epoxy lossis polyurethane txheej tseem ua haujlwm rau cov chaw hnyav (piv txwv li, patios). Nyob rau hauv ntug dej hiav txwv / ntsev ntsev, kev tu siab li qub (ua haujlwm txhua txhua 3-5 xyoos) yog qhov tsim nyog los tiv thaiv xeb. Q235 tus nqi qis ua rau nws pheej yig rau cov phiaj xwm sab nraum zoov thaum ua khub nrog kev tiv thaiv, tsis zoo li cov xim kim corrosion-resistant steels. Zam txhob siv Q235 sab nraum zoov, vim nws yuav xeb tsis pub dhau lub hlis.
- Q: A572 Gr.50 li piv rau Q345 li cas?
A: A572 GR.50 thiab Q345 muaj zoo heev, yuav luag zoo ib yam Weldability. Ob leeg yog HSLA cov hlau nrog cov ntsiab lus muaj roj carbon tsawg (A572: tsawg dua lossis sib npaug ntawm 0.20%) thiab sib npaug nrog 0.20%, sib npaug nrog mig, tig, thiab pas nrig vuam. Tsis muaj preheating yog xav tau rau thicknesses nyob rau hauv 25mm, uas yog ib qho uas muaj ntau qhov sib txig sib txig sib txig sib txig sib luag. Siv E7018 electrodes rau lo vuam los yog er70s-}}}}}} 6 xaim welding, cig vuam, ductile welds. Welded pob qij txha rau ob qib kawm tau raws cov qauv qauv sib ntsib (Astm A36 / A572 lossis GB 50205). Rau kev sib xyaw-qib ua, vuam A572 thiab Q345 ua ke muaj kev nyab xeeb, raws li lawv cov tshuaj lom neeg muaj feem sib luag. Cov ntaub soersators txaus siab rau ob qib rau yooj yim, txhim khu kev qha vuam.
- Q: Dab tsi yog MOQ rau Astm / GB sib npaug lub suab sib npaug?
A: Qhov kev txiav txim yam tsawg kawg nkaus (MOQ) rau ASTM / GB sib npaug lub suab sib npaug yog 5} 10 metric tons, nyob ntawm qib thiab loj. Cov qauv qib (A36, Q235) thiab cov qhov ntau thiab tsawg (50x/xm, 80 x80xm) muaj qis tshaj plaws moqs (5 tons) vim muaj qib siab. Tsawg cov qib kawm (A572 GR.65, Q345E) lossis loj loj (160x160mm +) xav}}}}} Kev txiav txim siab saum toj saud lub MOQ tsis muaj qhov muag tau ua ntej Yog tias koj xav tau tsawg dua li cov MOQ, cov neeg xa xov xwm muab cov khoom me me tab sis them tus nqi 10% -15% hwm. Kev sib txuas cov qib / qhov ntau thiab tsawg (piv txwv li,36 +} Q235) tuaj yeem pab ua kom tau raws li cov phiaj xwm me me. Txog kev txiav txim ceev ceev, qee tus neeg xa khoom muaj cov khoom siv rau hauv cov khoom rau tus nqi.
Teeb 3
- Q: Cov phiaj xwm dab tsi siv A36 sib npaug kaum ntse tuav feem ntau?
A: A36 sib npaug kaum sab xis cov ceg yog cov staples hauv kev tsim kho, siv rau kev tsim cov thav ntawv, cov tsev sib tw hauv tsev, thiab vaj tse sib txawv. Lawv lub zog sib luag ua rau lawv zoo tshaj rau lub teeb {{2} {} nruab nrab shring, conveyor thav ntawv, thiab kev pab cuam tshuam. DIY rau siab siv A36 rau kev ua haujlwm, cov cuab yeej siv tsheb, thiab lub vaj tsev vim tias yooj yim ua haujlwm. Hauv kev tsim kho, lawv tau siv rau cov kws tiv thaiv, choj bracing, thiab cov dej ntws txhawb. A36's Astm kev ua raws cai ua rau nws yuav tsum tau ua rau ntau cov haujlwm North American, thaum nws muaj kev ntseeg tau tias muaj peev xwm ua rau loj hlob loj- nplai kev tsim kho. Nws kuj tseem muaj teeb meem nyob rau hauv rooj tog tsim rau cov ceg ceg ceg thiab txee rau.
- Q: Yuav ua li cas tuab yuav q345 sib npaug kaum ntse ntse cov pob tau txais?
A: Q345 Sib npaug lub kaum ntse ntse cov pob zeb muaj nyob rau hauv thicknesses los ntawm 3mm txog 25mm, sib piv ceg ntev rau lub zog zoo. Cov ceg me me (30 {{{196) muaj 3-8 hli thickness, nruab nrab (63-16mm, thiab loj (140-200mm) 10-25mm. Nrov tuab ntau npaum li cas suav nrog 100 x 100 hli 1.x12 (rau cov kab ntawv tsev) thiab 160x160x16mm (rau cov tshuab hnyav (rau cov tshuab hnyav). Thicker tuav (20-25mm) yog siv rau cov ntawv thov thauj heev xws li ntug dej kev txhawb nqa, raws li lawv tsis muaj kev ntxhov siab nyob hauv siab. Cov neeg xa khoom feem ntau cov khoom lag luam tuab mus txog 16 hli; 20-25mm tuaj yeem xav tau 1-2-2 lub lim tiam ua. Thicker Q345 tuav tus nqi ntau dua tab sis tshem tawm qhov kev xav tau rau ntau cov kab xev, txo cov laj kab.
- Q: Yog A572 cov ces kaum sib npaug muaj nyob hauv kev cai ntev?
A: Yog, A572 cov ces kaum sib npaug yog muaj nyob rau hauv kev cai ntev kom haum txoj haujlwm xav tau. Cov qauv ntev yog 6M, 9m, thiab 12m, tab sis cov neeg xa khoom tuaj yeem tsim tau ntev 3m txog 18m. Kev cai luv luv ntev (3 {{19m) yog qhov zoo rau cov phiaj xwm me me, thaum ntev}}}}}}}}}}}}}}}}}}} Kev cai ntev tej zaum muaj 5% -10% tus nqi hwm thiab ntxiv 3-7 hnub rau kev tsim khoom. Txog ntev tshaj 18m, kev thauj khoom tshwj xeeb (oversized load ntawv tso cai) xav tau, nce nqi nce ntxiv. Kev qhia kom meej kiag li ntev minimizes cov khoom pov tseg - qhov tseem ceeb rau cov phiaj xwm kev siv nyiaj txiag. Nco ntsoov paub meej qhov ntev tshaj plaws nrog cov neeg muab khoom, raws li nws nyob ntawm Rolling zeb muaj peev xwm.
- Q: Dab tsi yog qhov hnyav ntawm 80xxx8mm Q235 sib npaug kaum ib nti?
A: Ib 80 xx0x8M8 Q235 Sib npaug lub suab sib npaug ntawm thaj tsam kwv yees li 9.62 kg ib meter. Qhov hnyav yog xam siv cov mis: phaus (kg / m) {}}}}}}} tuab tuab)} Thickness. Plugging nyob rau hauv qhov tseem ceeb: 0.00785 × (2 ×} {{{{15} {{15} {{15} {{15} {{15} {{15} {{15} {{15} {{15} {{15} {{15} {{15} {{15} {{15} { A 6 {{{{}} meter ntev hnyav ~ 57.72,72 kg, 12 {} meter '~} meter. Qhov hnyav no zoo ib yam rau lwm qib (A36, A572) ntawm tib qho loj, raws li qhov hnyav yog nyob ntawm ntim, tsis yog alloy cov ntsiab lus. Paub txog qhov hnyav yuav pab xam cov nqi thauj khoom, thauj khoom muaj peev xwm, thiab cov khoom muaj ntau rau cov phiaj xwm-qhov tseem ceeb rau kev npaj raug.
- Q: Vim li cas yog Q345 nrov rau cov haujlwm tsim kev tsim kho tshiab?
A: Q345 yog nrov hauv kev tsim kho Suav vim nws ua raws li GB tus qauv (yuav tsum tau ua rau cov haujlwm hauv cheeb tsam) thiab ntsuas lub zog}} tus nqi piv txwv. Nws 345 MPa paib lub zog sib ntsib nruab nrab-}} Cov ntas ultra) tsis muaj cov txheej txheem siab. Q345's Weldability zoo thiab Formability ua kom yooj yim rau kev ua kom yooj yim rau hauv kev cai cov Cheebtsam, nrawm siv sijhawm siv kev tsim kho. Nws tau dav los ntawm Suav steel mills, kom muaj kev ruaj khov thiab muaj nqi sib tw. Q345 tseem muaj tsawg - kub kev kub shockness Qib (Q345d / e) rau cov cheeb tsam txias xws li Suav teb. Rau cov lag luam Suav, Q345 yog qhov mus - mus rau qib rau cov kev cai sib ntsib cov cai thiab cov peev txheej npaj nyiaj.
Teeb 4
- Q: Yuav muaj A36 sib npaug sib npaug yog galvanized rau corrosion tsis kam?
A: Yog, A36 cov ces kaum sib npaug los txhawb cov galgles tsis kam, ua rau lawv haum rau sab nraum zoov lossis siab {} noo noo cov dej num. Kub - dip galvanizing yog cov txheej txheem tshaj plaws {} olten zinc tsim nyob rau hauv molten zinc tsim ib qho 50}} 100μm tuab tiv thaiv txheej. Galvanized A36 Tshaj tawm xeb rau 10 {14 14}}}}}} 20 xyoo sab nraum zoov, txawm tias thaj chaw noo lossis dej hiav txwv. Cov txheej txheem galvanizing ntxiv ntxiv 30% {{{19% rau tus nqi txij nkawm tab sis txo cov nqi tswj kev them lub sijhawm ntev (tsis muaj kev rov ua dua). Feem ntau cov neeg muab khoom siv ua ntej galvanized A36 hauv Tshuag, nrog cov noob txhuas lub sijhawm 3-7 hnub. Galvanized A36 tau siv rau cov kws ua yeeb yaj kiab, cov tubrog nkoj, thiab cov cuab yeej ua liaj ua liaj ua teb-cov ntaub ntawv uas xeb yuav ua rau kev puas tsuaj loj. Nco ntsoov tias Galvanizing yuav nce me ntsis nce rau qhov ntev, yog li tus account rau qhov no hauv kev tsim.
- Q: Dab tsi yog qhov txawv ntawm Q235A thiab Q235B sib npaug cov ces kaum?
A: Q235A thiab Q235B yog cov sib cais ntawm Q235, txawv feem ntau hauv kev cuam tshuam cov kev cuam tshuam nyuaj. Q235B undergoes cuam tshuam kev sim ntawm 20 degree, kom nws resistays brittle fracture, Thaum Q235A tsis muaj qhov cuam tshuam yuav tsum tau ua. Qhov no ua rau Q235b tsim rau sab nraum zoov lossis txias- chaw tsim kho), Thaum Q235A yog rau sab hauv tsev (piv txwv li thaj chaw nyob sab hauv tsev (piv txwv li, sab hauv qab zib). Chemically, ob qho tib si muaj tib cov ntsiab lus carbon (0.14-0.22%) thiab paib lub zog (235 mpa). Q235b cov nqi 5% -10% ntau dua Q235A tab sis muaj nqis rau tus nqi rau cov phiaj xwm raug rau kev hloov pauv kub. Cov chaw muag khoom ob qho tib si sib koom ua ke, nrog Q235B ntau dua cov neeg tsim kev tsim kho vim yog cov nqi hluav taws xob dav dav.
- Q: Nws siv sijhawm ntev npaum li cas los xa Astm / GB sib npaug lub suab sib npaug?
A: Lub sijhawm xa khoom rau ASTM / GB sib npaug lub suab sib npaug yog 7 -}}, nyob ntawm qib, loj, thiab qhov chaw. Hauv {{{}} Cov qauv qauv qib (A36, Q235) thiab qhov ntau thiab tsawg nkoj hauv 7-10 hnub rau cov xa khoom hauv zos. Kev cai ntev / tiav (fullices (galvanized) lossis tsawg qhab nia (A572 GR.60, Q345E) noj 10-14 hnub rau ntau lawm, ntxiv rau kev xa khoom. International Kev Xa Khoom los ntawm Hiav Txwv (xws li, Suav teb rau peb) siv 20-30 hnub; Huab cua thauj khoom txiav qhov no mus rau 3-5 hnub tab sis cov nqi 2-3 x ntxiv. Cov caij nyoog tsim kho siab (Lub Peb Hlis-Lub Yim Hli) txuas ntxiv xa los ntawm 3-5 hnub vim muaj kev thov siab. Cov chaw muag khoom muab ntau lawm ntau dua rau 10% -15% ntxiv, txo cov hmoov txhuas los ntawm 2-3 hnub. Nco ntsoov cov ntaub ntawv nrog cov neeg xa khoom mus kho nrog cov sij hawm npaj.
